论文标题
5,860公里长的洲际光纤电缆的频率稳定性和相位噪声测量值
Frequency stability and phase noise measurements of a 5,860 km-long intercontinental seafloor optical fibre cable
论文作者
论文摘要
通过光纤链接进行了光学时钟比较，在大陆尺度上已经实现了，但尚未跨二世。由于海底电缆架构阻止了当前在基于陆地的计量链路上使用的环境噪声抑制技术，因此超稳的光学频率在跨波动距离上的转移是一项艰巨的任务。作为设计合适的频率传输技术以实现全球范围的未来时钟比较的基本第一步，我们在这里显示了跨大西洋海底光学连接的自由运行频率稳定性和相位噪声测量。据我们所知，这些是有史以来第一个测量洲际光纤链接的测量。
Optical clock comparison via optical fibre links has been achieved over continental scales, but has not yet been demonstrated intercontinentally. The transfer of ultra-stable optical frequencies over transoceanic distances is a challenging task, as the seafloor cable architecture prevents the use of environmental noise suppression techniques currently employed on land-based metrological links. As a fundamental first step towards devising suitable frequency transfer techniques to enable future clock comparison on a global scale, here we show the free-running frequency stability and phase noise measurements of a transatlantic seafloor optical link between the UK and Canada. To the best of our knowledge, these are the first ever measurements of an intercontinental optical fibre link.
